20 |
|
#define vfork fork |
21 |
|
#endif |
22 |
|
|
23 |
< |
#define NSCANS 32 /* number of scanlines to buffer */ |
23 |
> |
#define NSCANS 64 /* number of scanlines to buffer */ |
24 |
|
|
25 |
|
int rt_pid = -1; /* process id for rtrace */ |
26 |
|
int fd_tort, fd_fromrt; /* pipe descriptors */ |
149 |
|
float *vb; |
150 |
|
{ |
151 |
|
float rt_buf[6*MAXPIX]; /* rtrace send/receive buffer */ |
152 |
< |
int npix_tort; /* number of pixels in buffer */ |
152 |
> |
register int n; /* number of pixels in buffer */ |
153 |
|
short buf_vh[MAXPIX]; /* pixel positions */ |
154 |
|
FVECT dir; |
155 |
|
register int vh; |
156 |
– |
register int i; |
156 |
|
|
157 |
|
if (verbose) |
158 |
|
fprintf(stderr, "%s: computing view span at %d...\n", |
159 |
|
progname, vv); |
160 |
< |
npix_tort = 0; |
160 |
> |
n = 0; |
161 |
|
for (vh = -hsize; vh <= hsize; vh++) { |
162 |
|
if (compdir(dir, vh, vv) < 0) { /* off viewable region */ |
163 |
|
vb[vh+hsize] = -1.0; |
168 |
|
if (rt_pid == -1) /* missing information */ |
169 |
|
continue; |
170 |
|
/* send to rtrace */ |
171 |
< |
if (npix_tort >= MAXPIX) { /* flush */ |
172 |
< |
rt_compute(rt_buf, npix_tort); |
173 |
< |
for (i = 0; i < npix_tort; i++) |
174 |
< |
vb[buf_vh[i]+hsize] = luminance(rt_buf+3*i); |
176 |
< |
npix_tort = 0; |
171 |
> |
if (n >= MAXPIX) { /* flush */ |
172 |
> |
rt_compute(rt_buf, n); |
173 |
> |
while (n-- > 0) |
174 |
> |
vb[buf_vh[n]+hsize] = luminance(rt_buf+3*n); |
175 |
|
} |
176 |
< |
rt_buf[6*npix_tort] = ourview.vp[0]; |
177 |
< |
rt_buf[6*npix_tort+1] = ourview.vp[1]; |
178 |
< |
rt_buf[6*npix_tort+2] = ourview.vp[2]; |
179 |
< |
rt_buf[6*npix_tort+3] = dir[0]; |
180 |
< |
rt_buf[6*npix_tort+4] = dir[1]; |
181 |
< |
rt_buf[6*npix_tort+5] = dir[2]; |
182 |
< |
buf_vh[npix_tort++] = vh; |
176 |
> |
rt_buf[6*n] = ourview.vp[0]; |
177 |
> |
rt_buf[6*n+1] = ourview.vp[1]; |
178 |
> |
rt_buf[6*n+2] = ourview.vp[2]; |
179 |
> |
rt_buf[6*n+3] = dir[0]; |
180 |
> |
rt_buf[6*n+4] = dir[1]; |
181 |
> |
rt_buf[6*n+5] = dir[2]; |
182 |
> |
buf_vh[n++] = vh; |
183 |
|
} |
186 |
– |
if (npix_tort > 0) { /* process pending buffer */ |
187 |
– |
rt_compute(rt_buf, npix_tort); |
188 |
– |
for (i = 0; i < npix_tort; i++) |
189 |
– |
vb[buf_vh[i]+hsize] = luminance(rt_buf+3*i); |
190 |
– |
} |
184 |
|
if (verbose) |
185 |
|
pict_stats(); |
186 |
+ |
if (n > 0) { /* process pending buffer */ |
187 |
+ |
rt_compute(rt_buf, n); |
188 |
+ |
while (n-- > 0) |
189 |
+ |
vb[buf_vh[n]+hsize] = luminance(rt_buf+3*n); |
190 |
+ |
} |
191 |
|
} |
192 |
|
|
193 |
|
|
296 |
|
perror(progname); |
297 |
|
exit(1); |
298 |
|
} |
299 |
+ |
close(p0[0]); |
300 |
+ |
close(p1[1]); |
301 |
|
fd_tort = p0[1]; |
302 |
|
fd_fromrt = p1[0]; |
303 |
|
} |